On models equipped with fuel injected engines, relieve fuel system pressure as outlined under "Fuel System Pressure Relief."

On models equipped with metal collar quick
disconnect connectors, GM tool No. J37088-A, or equivalent, will
be required to disconnect the connector. Prior to reconnecting the connector,
apply a few drops of clean motor oil to the male pipe ends.

On models equipped with plastic collar quick
disconnect connectors, squeeze the connector plastic retainer release
tabs to release the connector. Prior to reconnecting the connector, apply
a few drops of clean motor...